Lady GaGa to join Beyoncé on stage for 'Mrs Carter Show' in New York?

Lady GaGa could reportedly join Beyoncé on stage for one gig in New York this summer.

According to an email sent out by concert listings website Songkick (via Metro), the 'Telephone' collaborators will perform on Beyoncé's 'Mrs Carter Show' world tour at the Barclays Center in Brooklyn on August 3.